Improvement in furnace-grates



ZSheets-Sheet 14 C. DEGUINE. FUnNA'cE-G-RATE.

Patented May 22,1877.

2 She ets-She et 2.

C. DEGUINE.

FURNACE-GRATE.

2 Patented May 22,1877.

STATES PATENT Ormea.

\ o AsIMInDEeUINE, or BoULoeNnsUn-MER, FRANCE.

IMPROVEMENT |N FURNACE-GRATES.

4 Specification forming part of Letters Patent N 0. 191,002, dated May 22, 1877; application filed Apri111, 1877.

To all whom it may concern:

Be it known that I, GASIMIR DEGUINE, of 7 Rue Montebello Capecure, Boulogne-sur- Mer, France, have invented new and useful Improvements in Furnace-Grates, such improvements being applicable to all kinds of ovens, furnaces, stoves, and fire-places, which improvements are fully set forth in the following specification, reference being had to the 4accompanying drawings.

The object of this invention is the construction of furnace grates adapted to steamboilers and other furnaces, and my improvements are essentially the same as shown in my English Letters Patent No. 2,983 of 1874.

The principle upon which my invention is based is to cause air already highly heated to pass through the fuel in the grate, and I accomplish this in the following manner: I entirely, or almost entirely, exclude the cold air from the ash-pit, and I employ hollow lirebars, which permit the air to enter in front facing the furnace, and conduct it to the bottom ofthe hearth and to the closed ash-pit, and afterward the air passes through the grate and the coal or other fuel in combustion therein, the air having become much heated in its passage through the hollow flre'bars. I increase the capacity of the air openings and spaces by placing all around the grate large ues, acting in conjunction with the fire-bars thereof.

And in order that my invention may be better understood andmore readily carried into operation, I will now proceed to describe the sheet of drawings hereunto annexed.l

Figure 1 is a longitudinal section along the line l 2 of the plan. Fig. 2 is a transverse section following the broken line 7 8 9 10 of the plan. Fig. 3 is a plan of the re-bars of the grate and the exterior flnes following the line 3 4 on Fig. 1.

In Figs. l, 2, and 3 similar letters and rigures of reference refer to similar parts.`

A is a fire-bar lug 'or bearer, resting at its two extremities upon the vertical walls of the furnace. It is formed with rectangular openings a a. a, corresponding in number and size to the re-bars of the grate; those at the extremities a a. are made larger, to correspond B is a lire-bar lug or support,

with the dues.

resting in a similar manner upon the walls of the furnace at its two extremities, and formed 011 its horizontal part with openings b, intended to receive the open parts at the extremities of the lire-bars. Each aperture is separated from the next by a rib or bracket, b. C O are fire-bars, of a suitable size and number, according to the form of the grate for which they are used. In the drawings they h are shown of a rectangular form, slightly rounded at the top, and having throughout their length hollow grooves c c, terminating in an opening at U1. These bars are placed side by side at a suitable distance apart, and fixed in their required positions by small counterparts or buttresses G2 G2.

D D1 are flues, resting on the walls at the two sides of the fire-place. They are made hollow, and of the shape shown at Fig. 2, and are open in the front part. They are united at the back to a similar flue, D2, having in its center a partition, d2, and two apertures, d d1, so that the air which enters at the due D escapes through the opening d, and that which enters the flue Dl escapes through the aperture d1 and enters the ashpan through the apertures d3 d4. Fig. 6 represe/nts these dues with diaphragme or central partitions D3, ot' such a form that the exterior air entering by the openings D4 D4 passes round D5 and escapes to the ash-pan by the openings D6. The ash-pit is shut up by doors E, of sheet-iron.

The action of this furnace is extremely simple. The ash-pit being previously closed, the exterior air enters by the openin g a, introduces itself into the hollow bars forming the grate, and at the extremity Cl descends into the ashpit G, where it again ascends, passing through the grating and the fuel thereon.

It will be readily understood that the fresh air, passing through each of these red-hot bars, reaches the closed ash-pan at a very high temperature, and again escaping passes between the fire-bars of the grate and assists the combustion of the fuel thereon at this high temperature. The tlues D and Dl are intended to augment the quantity of hot air admitted to the grate.

Figs. 4 and 5 show the application of passages L above the fire-bars to increase the supply of hot air to the ash-pit. The air enters and passes along the horizontal passage L to the extremity of the tire-grate, then de scends and passes by the opening L into the ash-pit.

Having thus particularly described and ascertained the nature of my said invention, and how the same may be carried into practical operation, I would have it understood that what I claim is- 1. The combination of fire-bar lugs or bearers A B, having openings a, b, and the hollow rebars C, receiving air at their front ends by the openings a, and terminating in d0wnward openings C* at their rear ends, communieating by the openings b with the ash-pit, substantially as set forth.

GASR. DEGUINE.

Witnesses L. DARGUER, F. PESTAIE. 

